EXTRUSION NOZZLES, METHODS, AND SYSTEMS FOR THREE DIMENSIONAL PRINTING

摘要

Technologies are generally described for an extrusion nozzle of a 3D printing system that allows deposition and rapid solidification of a resin layer on a non-uniform substrate surface in order to form a 3D printed article of various shape and size. The extrusion nozzle may include a center tube that facilitates a flow of resin through the center tube to deposit the resin layer on the substrate surface. A second tube may surround the center tube such that a first annular space between the center tube and the second tube is vacuum-insulated to maintain the resin at a constant temperature as it flows through the center tube and is deposited. A third tube may surround the second tube, and guide a deposition of a cooling gas onto the deposited resin layer through a second annular space between the second tube and the third tube to rapidly solidify the resin layer.